Abstract: Given the critical role of thin-film feedback throttles in hydrostatic technology, a systematic investigation into parameter design and characteristic regulation has been conducted through integrated theoretical modeling, numerical analysis, and experimental research. A mathematical model of the throttle’s flow characteristics has been established, revealing the theoretical relationship between flow rate and throttle clearance. The dynamic adjustment mechanism of film deformation on clearance under varying pressure differentials has been analyzed. An experimental setup was constructed to examine the influence of input oil pressure and throttle clearance on output oil pressure and flow characteristics. The experimental results demonstrated that the output oil pressure increased monotonically with increasing clearance. Regarding flow characteristics, the experimental data exhibit overall consistency with numerical calculations in terms of trend. The throttle has been applied to a hydrostatic guideway, achieving a vertical stiffness of 2 000 N/μm and a horizontal stiffness of 525 N/μm. This study provides theoretical and experimental foundations for parameter optimization and high-precision manufacturing of thin-film feedback throttles.